Fit Text To A Shape
Right click the the shape that contains the text that does not fit. On the short cut menu click Format Text Box. In the Format Autoshape Dialog box click the Text Box tab. Under Text Autofitting select the option you want. You can also reduce the size of the margin between the text and the border of the shape. To do this right click the selection rectangle of the shape you want to change. On the short cut menu click Format Auto Shape. In the Format Autoshape dialog box click the text box tab. On the text box margins adjust the measurements to increase or decrease the distance between the text and the outer border of the shape